python-2.7 - 导入 matplotlib._png 作为 _png 导入 : Error: DLL load failed: The specified module could not be found

Question

我使用 Anaconda Python 发行版:Python 2.7 x64 和 Windows 7 SP1 x64 Ultimate。

当我import matplotlib.pyplot时，我得到ImportError:DLL加载失败:找不到指定的模块。。可能是什么问题？

完整错误堆栈:

Traceback (most recent call last):
  File "C:\svn\hw4\code\test_con.py", line 1, in <module>
    import matplotlib.pyplot 
  File "C:\Anaconda\lib\site-packages\matplotlib\pyplot.py", line 27, in <module>
    import matplotlib.colorbar
  File "C:\Anaconda\lib\site-packages\matplotlib\colorbar.py", line 34, in <module>
    import matplotlib.collections as collections
  File "C:\Anaconda\lib\site-packages\matplotlib\collections.py", line 27, in <module>
    import matplotlib.backend_bases as backend_bases
  File "C:\Anaconda\lib\site-packages\matplotlib\backend_bases.py", line 56, in <module>
    import matplotlib.textpath as textpath
  File "C:\Anaconda\lib\site-packages\matplotlib\textpath.py", line 22, in <module>
    from matplotlib.mathtext import MathTextParser
  File "C:\Anaconda\lib\site-packages\matplotlib\mathtext.py", line 63, in <module>
    import matplotlib._png as _png
ImportError: DLL load failed: The specified module could not be found.

conda update -f numpy、conda update -f libpng 和 conda update -f matplotlib 没有帮助。

conda list matplotlib 的输出:

C:\Anaconda>conda list matplotlib
# packages in environment at C:\Anaconda:
#
matplotlib                1.4.3               np110py27_2
matplotlib-venn           0.11                      <pip>

运行conda update --all后出现该问题。

Answer 1

我通过将 [Anaconda]/Library/bin 添加到我的 PATH 中，在 Windows 计算机上修复了此问题。